/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
module dwt.graphics.device;


private import dwt.dwt;

private import dwt.graphics.color;
private import dwt.graphics.devicedata;
private import dwt.graphics.drawable;
private import dwt.graphics.font;
private import dwt.graphics.fontdata;
private import dwt.graphics.gcdata;
private import dwt.graphics.point;
private import dwt.graphics.rectangle;
private import dwt.internal.compatibility;
private import dwt.internal.win32.os;

private import dwt.util.util;
private import dwt.util.javatypes;


/**
 * This class is the abstract superclass of all device objects,
 * such as the Display device and the Printer device. Devices
 * can have a graphics context (GC) created for them, and they
 * can be drawn on by sending messages to the associated GC.
 */
public abstract class Device : Drawable {
	/* Debugging */
	debug
	{
		public static boolean DEBUG_renamed;
		boolean debug_renamed;
		boolean tracking;
		Error [] errors;
		Object [] objects;
	}
	
	/* Palette 
	* (Warning: This field is platform dependent)
	*/
	public HPALETTE hPalette;
	int [] colorRefCount;
	
	/* System Font */
	HFONT systemFont;

	/* Font Enumeration */
	int nFonts = 256;
	LOGFONT* [] logFonts;

	/* Scripts */
	int [] scripts;
	LOGFONT* [] logFontsCache;

	boolean disposed;

	private static Device s_this;
	
	/*
	* TEMPORARY CODE. When a graphics object is
	* created and the device parameter is null,
	* the current Display is used. This presents
	* a problem because DWT graphics does not
	* reference classes in DWT widgets. The correct
	* fix is to remove this feature. Unfortunately,
	* too many application programs rely on this
	* feature.
	*
	* This code will be removed in the future.
	*/
	protected static Device CurrentDevice;
	protected static Runnable DeviceFinder;
//	private static boolean staticCtor_done = false;
//	static void staticCtor() {
//		if(staticCtor_done) return;
//		staticCtor_done = true;
//	
//		try {
//			Class.forName ("org.eclipse.dwt.widgets.Display");
//		} catch (Throwable e) {}
//	}	

/*
* TEMPORARY CODE.
*/
static Device getDevice () {
	if (DeviceFinder !is null) DeviceFinder.run();
	Device device = CurrentDevice;
	CurrentDevice = null;
	return device;
}
	
/**
 * Constructs a new instance of this class.
 * <p>
 * You must dispose the device when it is no longer required. 
 * </p>
 *
 * @param data the DeviceData which describes the receiver
 *
 * @see #create
 * @see #init
 * @see DeviceData
 */
public this(DeviceData data) {

	debug
	{
	debug_renamed = DEBUG_renamed;
	tracking = DEBUG_renamed;

	if (data !is null) {
		debug_renamed = data.debug_renamed;
		tracking = data.tracking;
	}
	}
	
	create (data);
	init ();

	debug
	{
	if (tracking) {
		errors = new Error [128];
		objects = new Object [128];
	}
	}
	
	/* Initialize the system font slot */
	systemFont = getSystemFont().handle;
}

/**
 * Throws an <code>SWTException</code> if the receiver can not
 * be accessed by the caller. This may include both checks on
 * the state of the receiver and more generally on the entire
 * execution context. This method <em>should</em> be called by
 * device implementors to enforce the standard DWT invariants.
 * <p>
 * Currently, it is an error to invoke any method (other than
 * <code>isDisposed()</code> and <code>dispose()</code>) on a
 * device that has had its <code>dispose()</code> method called.
 * </p><p>
 * In future releases of DWT, there may be more or fewer error
 * checks and exceptions may be thrown for different reasons.
 * <p>
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
protected void checkDevice () {
	if (disposed) DWT.error(__FILE__, __LINE__, DWT.ERROR_DEVICE_DISPOSED);
}

/**
 * Creates the device in the operating system.  If the device
 * does not have a handle, this method may do nothing depending
 * on the device.
 * <p>
 * This method is called before <code>init</code>.
 * </p><p>
 * Subclasses are supposed to reimplement this method and not
 * call the <code>super</code> implementation.
 * </p>
 *
 * @param data the DeviceData which describes the receiver
 *
 * @see #init
 */
protected void create (DeviceData data) {
}

int computePixels(int height) {
	HDC hDC = internal_new_GC (null);
	int pixels = -Compatibility.round(height * OS.GetDeviceCaps(hDC, OS.LOGPIXELSY), 72);
	internal_dispose_GC (hDC, null);
	return pixels;
}

int computePoints(LOGFONT* logFont) {
	HDC hDC = internal_new_GC (null);
	int logPixelsY = OS.GetDeviceCaps(hDC, OS.LOGPIXELSY);
	int pixels = 0; 
	if (logFont.lfHeight > 0) {
		/*
		 * Feature in Windows. If the lfHeight of the LOGFONT structure
		 * is positive, the lfHeight measures the height of the entire
		 * cell, including internal leading, in logical units. Since the
		 * height of a font in points does not include the internal leading,
		 * we must subtract the internal leading, which requires a TEXTMETRIC,
		 * which in turn requires font creation.
		 */
		HFONT hFont = OS.CreateFontIndirect(logFont);
		HFONT oldFont = OS.SelectObject(hDC, hFont);
		TEXTMETRIC* lptm = new TEXTMETRIC();
		OS.GetTextMetrics(hDC, lptm);
		OS.SelectObject(hDC, oldFont);
		OS.DeleteObject(hFont);
		pixels = logFont.lfHeight - lptm.tmInternalLeading;
	} else {
		pixels = -logFont.lfHeight;
	}
	internal_dispose_GC (hDC, null);

	return Compatibility.round(pixels * 72, logPixelsY);
}

/**
 * Destroys the device in the operating system and releases
 * the device's handle.  If the device does not have a handle,
 * this method may do nothing depending on the device.
 * <p>
 * This method is called after <code>release</code>.
 * </p><p>
 * Subclasses are supposed to reimplement this method and not
 * call the <code>super</code> implementation.
 * </p>
 *
 * @see #dispose
 * @see #release
 */
protected void destroy () {
}

/**
 * Disposes of the operating system resources associated with
 * the receiver. After this method has been invoked, the receiver
 * will answer <code>true</code> when sent the message
 * <code>isDisposed()</code>.
 *
 * @see #release
 * @see #destroy
 * @see #checkDevice
 */
public void dispose () {
	if (isDisposed()) return;
	checkDevice ();
	release ();
	destroy ();
	disposed = true;
	debug
	{
	if (tracking) {
		objects = null;
		errors = null;
	}
	}
}


debug
{
void dispose_Object (Object object) {
	
	for (int i=0; i<objects.length; i++) {
		if (objects [i] is object) {
			objects [i] = null;
			errors [i] = null;
			return;
		}
	}
}
}

extern (Windows)
static int EnumFontFamProc (ENUMLOGFONT* lpelfe, NEWTEXTMETRIC* lpntme, int FontType, LPARAM lParam) {

	boolean isScalable = (FontType & OS.RASTER_FONTTYPE) == 0;
	boolean scalable = lParam == 1;
	if (isScalable == scalable) {
		/* Add the log font to the list of log fonts */
		if (s_this.nFonts == s_this.logFonts.length) {
			LOGFONT* [] newLogFonts = new LOGFONT* [s_this.logFonts.length + 128];
			System.arraycopy (cast(Object[])s_this.logFonts, 0, cast(Object[])newLogFonts, 0, s_this.nFonts);
			s_this.logFonts = newLogFonts;
		}
		LOGFONT* logFont = s_this.logFonts [s_this.nFonts];
		if (logFont is null) logFont = new LOGFONT ();
		OS.MoveMemory (logFont, lpelfe, LOGFONT.sizeof);
		s_this.logFonts [s_this.nFonts++] = logFont;
	}
	return 1;
}

/**
 * Returns a rectangle describing the receiver's size and location.
 *
 * @return the bounding rectangle
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Rectangle getBounds () {
	checkDevice ();
	HDC hDC = internal_new_GC (null);
	int width = OS.GetDeviceCaps (hDC, OS.HORZRES);
	int height = OS.GetDeviceCaps (hDC, OS.VERTRES);
	internal_dispose_GC (hDC, null);
	return new Rectangle (0, 0, width, height);
}

/**
 * Returns a <code>DeviceData</code> based on the receiver.
 * Modifications made to this <code>DeviceData</code> will not
 * affect the receiver.
 *
 * @return a <code>DeviceData</code> containing the device's data and attributes
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see DeviceData
 */
public DeviceData getDeviceData () {
	checkDevice();
	DeviceData data = new DeviceData ();

	debug
	{
	data.debug_renamed = debug_renamed;
	data.tracking = tracking;
	int count = 0, length = 0;
	if (tracking) length = objects.length;
	for (int i=0; i<length; i++) {
		if (objects [i] !is null) count++;
	}
	int index = 0;
	data.objects = new Object [count];
	data.errors = new Error [count];
	for (int i=0; i<length; i++) {
		if (objects [i] !is null) {
			data.objects [index] = objects [i];
			data.errors [index] = errors [i];
			index++;
		}
	}
	}
	return data;
}

/**
 * Returns a rectangle which describes the area of the
 * receiver which is capable of displaying data.
 * 
 * @return the client area
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #getBounds
 */
public Rectangle getClientArea () {
	return getBounds ();
}

/**
 * Returns the bit depth of the screen, which is the number of
 * bits it takes to represent the number of unique colors that
 * the screen is currently capable of displaying. This number 
 * will typically be one of 1, 8, 15, 16, 24 or 32.
 *
 * @return the depth of the screen
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public int getDepth () {
	checkDevice ();
	HDC hDC = internal_new_GC (null);
	int bits = OS.GetDeviceCaps (hDC, OS.BITSPIXEL);
	int planes = OS.GetDeviceCaps (hDC, OS.PLANES);
	internal_dispose_GC (hDC, null);
	return bits * planes;
}

/**
 * Returns a point whose x coordinate is the horizontal
 * dots per inch of the display, and whose y coordinate
 * is the vertical dots per inch of the display.
 *
 * @return the horizontal and vertical DPI
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Point getDPI () {
	checkDevice ();
	HDC hDC = internal_new_GC (null);
	int dpiX = OS.GetDeviceCaps (hDC, OS.LOGPIXELSX);
	int dpiY = OS.GetDeviceCaps (hDC, OS.LOGPIXELSY);
	internal_dispose_GC (hDC, null);
	return new Point (dpiX, dpiY);
}

/**
 * Returns <code>FontData</code> objects which describe
 * the fonts that match the given arguments. If the
 * <code>faceName</code> is null, all fonts will be returned.
 *
 * @param faceName the name of the font to look for, or null
 * @param scalable if true only scalable fonts are returned, otherwise only non-scalable fonts are returned.
 * @return the matching font data
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public FontData [] getFontList (char[] faceName, boolean scalable) {
	checkDevice ();
	
	s_this = this;

	
	/* Initialize the instance variables */
	logFonts = new LOGFONT* [nFonts];
	for (int i=0; i<logFonts.length; i++) {
		logFonts [i] = new LOGFONT ();
	}
	nFonts = 0;

	/* Enumerate */
	int offset = 0;
	HDC hDC = internal_new_GC (null);
	if (faceName is null) {	
		/* The user did not specify a face name, so they want all version_rens of all available face names */
		OS.EnumFontFamilies (hDC, null, &EnumFontFamProc, scalable ? 1 : 0);
		
		/**
		 * For bitmapped fonts, EnumFontFamilies only enumerates once for each font, regardless
		 * of how many styles are available. If the user wants bitmapped fonts, enumerate on
		 * each face name now.
		 */
		offset = nFonts;
		for (int i=0; i<offset; i++) {
			LOGFONT* lf = logFonts [i];
			/**
			 * Bug in Windows 98. When EnumFontFamiliesEx is called with a specified face name, it
			 * should enumerate for each available style of that font. Instead, it only enumerates
			 * once. The fix is to call EnumFontFamilies, which works as expected.
			 */
			
			OS.EnumFontFamilies (hDC, lf.lfFaceName.ptr, cast(FONTENUMPROC) &EnumFontFamProc, scalable ? 1 : 0);
		}
	} else {
		/* Use the character encoding for the default locale */
		/**
		 * Bug in Windows 98. When EnumFontFamiliesEx is called with a specified face name, it
		 * should enumerate for each available style of that font. Instead, it only enumerates
		 * once. The fix is to call EnumFontFamilies, which works as expected.
		 */
		OS.EnumFontFamilies (hDC, Converter.StrToTCHARz(faceName), &EnumFontFamProc, scalable ? 1 : 0);
	}
	internal_dispose_GC (hDC, null);

	/* Create the fontData from the logfonts */
	int count = nFonts - offset;
	FontData [] result = new FontData [count];
	for (int i=0; i<count; i++) {
		LOGFONT* logFont = logFonts [i+offset];
		result [i] = FontData.win32_new (logFont, computePoints(logFont));
	}
	
	/* Clean up */
//	callback.dispose ();
	s_this = null;
	
	logFonts = null;
	return result;
}

public static char[] getLastError () {
	int error = OS.GetLastError();
	if (error == 0) return ""; 
	return (" [GetLastError=") ~ Converter.toHex(error) ~ "]";
}

public static char[] getLastErrorText () {
	int error = OS.GetLastError();
	if (error == 0) return "";
	
	TCHAR* buffer = null;
	int dwFlags = OS.FORMAT_MESSAGE_ALLOCATE_BUFFER | OS.FORMAT_MESSAGE_FROM_SYSTEM | OS.FORMAT_MESSAGE_IGNORE_INSERTS;
	int length = OS.FormatMessage(dwFlags, null, error, OS.LANG_USER_DEFAULT, cast(TCHAR*)&buffer, 0, null);
	char[] errorNum = ("[GetLastError=") ~ Converter.toHex(error) ~ "] ";
	if (length == 0) return errorNum;
	char[] buffer1 = Converter.TCHARzToStr(buffer, length);
	if ( *buffer != 0) 
		OS.LocalFree(cast(HLOCAL)buffer);
	return errorNum ~ buffer1;
}

/**
 * Returns the matching standard color for the given
 * constant, which should be one of the color constants
 * specified in class <code>DWT</code>. Any value other
 * than one of the DWT color constants which is passed
 * in will result in the color black. This color should
 * not be free'd because it was allocated by the system,
 * not the application.
 *
 * @param id the color constant
 * @return the matching color
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see DWT
 */
public Color getSystemColor (int id) {
	checkDevice ();
	int pixel = 0x02000000;
	switch (id) {
		case DWT.COLOR_WHITE:				pixel = 0x02FFFFFF;  break;
		case DWT.COLOR_BLACK:				pixel = 0x02000000;  break;
		case DWT.COLOR_RED:					pixel = 0x020000FF;  break;
		case DWT.COLOR_DARK_RED:			pixel = 0x02000080;  break;
		case DWT.COLOR_GREEN:				pixel = 0x0200FF00;  break;
		case DWT.COLOR_DARK_GREEN:			pixel = 0x02008000;  break;
		case DWT.COLOR_YELLOW:				pixel = 0x0200FFFF;  break;
		case DWT.COLOR_DARK_YELLOW:			pixel = 0x02008080;  break;
		case DWT.COLOR_BLUE:				pixel = 0x02FF0000;  break;
		case DWT.COLOR_DARK_BLUE:			pixel = 0x02800000;  break;
		case DWT.COLOR_MAGENTA:				pixel = 0x02FF00FF;  break;
		case DWT.COLOR_DARK_MAGENTA:		pixel = 0x02800080;  break;
		case DWT.COLOR_CYAN:				pixel = 0x02FFFF00;  break;
		case DWT.COLOR_DARK_CYAN:			pixel = 0x02808000;  break;
		case DWT.COLOR_GRAY:				pixel = 0x02C0C0C0;  break;
		case DWT.COLOR_DARK_GRAY:			pixel = 0x02808080;  break;
		default : break;
	}
	return Color.win32_new (this, pixel);
}

/**
 * Returns a reasonable font for applications to use.
 * On some platforms, this will match the "default font"
 * or "system font" if such can be found.  This font
 * should not be free'd because it was allocated by the
 * system, not the application.
 * <p>
 * Typically, applications which want the default look
 * should simply not set the font on the widgets they
 * create. Widgets are always created with the correct
 * default font for the class of user-interface component
 * they represent.
 * </p>
 *
 * @return a font
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Font getSystemFont () {
	checkDevice ();
	HFONT hFont = OS.GetStockObject (OS.SYSTEM_FONT);
	return Font.win32_new (this, hFont);
}

/**
 * Returns <code>true</code> if the underlying window system prints out
 * warning messages on the console, and <code>setWarnings</code>
 * had previously been called with <code>true</code>.
 *
 * @return <code>true</code>if warnings are being handled, and <code>false</code> otherwise
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public boolean getWarnings () {
	checkDevice ();
	return false;
}

/**
 * Initializes any internal resources needed by the
 * device.
 * <p>
 * This method is called after <code>create</code>.
 * </p><p>
 * If subclasses reimplement this method, they must
 * call the <code>super</code> implementation.
 * </p>
 * 
 * @see #create
 */
protected void init () {
	debug
	{
	if (debug_renamed) {
		version(WinCE) {} else {  OS.GdiSetBatchLimit(1); }
	}
	}

	/* Initialize scripts list */
	version(WinCE) {}
	else{
		int [] ppSp = new int [1];
		int piNumScripts;
		OS.ScriptGetProperties (cast(SCRIPT_PROPERTIES***)ppSp, &piNumScripts);
		scripts = new int [piNumScripts];
		OS.MoveMemory (scripts.ptr, ppSp [0], scripts.length * 4);
	}
	
	/*
	 * If we're not on a device which supports palettes,
	 * don't create one.
	 */
	HDC hDC = internal_new_GC (null);
	int rc = OS.GetDeviceCaps (hDC, OS.RASTERCAPS);
	int bits = OS.GetDeviceCaps (hDC, OS.BITSPIXEL);
	int planes = OS.GetDeviceCaps (hDC, OS.PLANES);
	
	bits *= planes;
	if ((rc & OS.RC_PALETTE) == 0 || bits != 8) {
		internal_dispose_GC (hDC, null);
		return;
	}
	
	int numReserved = OS.GetDeviceCaps (hDC, OS.NUMRESERVED);
	int numEntries = OS.GetDeviceCaps (hDC, OS.SIZEPALETTE);

	version(WinCE) {
		/*
		* Feature on WinCE.  For some reason, certain 8 bit WinCE
		* devices return 0 for the number of reserved entries in
		* the system palette.  Their system palette correctly contains
		* the usual 20 system colors.  The workaround is to assume
		* there are 20 reserved system colors instead of 0.
		*/
		if (numReserved == 0 && numEntries >= 20) numReserved = 20;
	}

	/* Create the palette and reference counter */
	colorRefCount = new int [numEntries];

	/* 4 bytes header + 4 bytes per entry * numEntries entries */
	byte [] logPalette = new byte [4 + 4 * numEntries];
	
	/* 2 bytes = special header */
	logPalette [0] = 0x00;
	logPalette [1] = 0x03;
	
	/* 2 bytes = number of colors, LSB first */
	logPalette [2] = 0;
	logPalette [3] = 1;

	/* 
	* Create a palette which contains the system entries
	* as they are located in the system palette.  The
	* MSDN article 'Memory Device Contexts' describes
	* where system entries are located.  On an 8 bit
	* display with 20 reserved colors, the system colors
	* will be the first 10 entries and the last 10 ones.
	*/
	byte[] lppe = new byte [4 * numEntries];
	OS.GetSystemPaletteEntries (hDC, 0, numEntries, cast(PALETTEENTRY*)lppe);
	/* Copy all entries from the system palette */
	System.arraycopy (lppe, 0, logPalette, 4, 4 * numEntries);
	/* Lock the indices corresponding to the system entries */
	for (int i = 0; i < numReserved / 2; i++) {
		colorRefCount [i] = 1;
		colorRefCount [numEntries - 1 - i] = 1;
	}
	internal_dispose_GC (hDC, null);
	hPalette = OS.CreatePalette (cast(LOGPALETTE*)logPalette);
}
/**	 
 * Invokes platform specific functionality to allocate a new GC handle.
 * <p>
 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
 * API for <code>Device</code>. It is marked public only so that it
 * can be shared within the packages provided by DWT. It is not
 * available on all platforms, and should never be called from
 * application code.
 * </p>
 *
 * @param data the platform specific GC data 
 * @return the platform specific GC handle
 */
public abstract HDC internal_new_GC (GCData data);

/**	 
 * Invokes platform specific functionality to dispose a GC handle.
 * <p>
 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
 * API for <code>Device</code>. It is marked public only so that it
 * can be shared within the packages provided by DWT. It is not
 * available on all platforms, and should never be called from
 * application code.
 * </p>
 *
 * @param hDC the platform specific GC handle
 * @param data the platform specific GC data 
 */
public abstract void internal_dispose_GC (HDC hDC, GCData data);

/**
 * Returns <code>true</code> if the device has been disposed,
 * and <code>false</code> otherwise.
 * <p>
 * This method gets the dispose state for the device.
 * When a device has been disposed, it is an error to
 * invoke any other method using the device.
 *
 * @return <code>true</code> when the device is disposed and <code>false</code> otherwise
 */
public boolean isDisposed () {
	return disposed;
}

debug
{
void new_Object (Object object) {
	
	for (int i=0; i<objects.length; i++) {
		if (objects [i] is null) {
			objects [i] = object;
			errors [i] = new Error ("error");
			return;
		}
	}
	Object [] newObjects = new Object [objects.length + 128];
	System.arraycopy (objects, 0, newObjects, 0, objects.length);
	newObjects [objects.length] = object;
	objects = newObjects;
	Error [] newErrors = new Error [errors.length + 128];
	System.arraycopy (errors, 0, newErrors, 0, errors.length);
	newErrors [errors.length] = new Error ("error");
	errors = newErrors;
}
}

/**
 * Releases any internal resources back to the operating
 * system and clears all fields except the device handle.
 * <p>
 * When a device is destroyed, resources that were acquired
 * on behalf of the programmer need to be returned to the
 * operating system.  For example, if the device allocated a
 * font to be used as the system font, this font would be
 * freed in <code>release</code>.  Also,to assist the garbage
 * collector and minimize the amount of memory that is not
 * reclaimed when the programmer keeps a reference to a
 * disposed device, all fields except the handle are zero'd.
 * The handle is needed by <code>destroy</code>.
 * </p>
 * This method is called before <code>destroy</code>.
 * </p><p>
 * If subclasses reimplement this method, they must
 * call the <code>super</code> implementation.
 * </p>
 *
 * @see #dispose
 * @see #destroy
 */
protected void release () {
	scripts = null;
	logFontsCache = null;
	if (hPalette !is null) OS.DeleteObject (hPalette);
	hPalette = null;
	colorRefCount = null;
	logFonts = null;
	nFonts = 0;
}

/**
 * If the underlying window system supports printing warning messages
 * to the console, setting warnings to <code>true</code> prevents these
 * messages from being printed. If the argument is <code>false</code>
 * message printing is not blocked.
 *
 * @param warnings <code>true</code>if warnings should be handled, and <code>false</code> otherwise
 *
 * @exception SWTException <ul>
 *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setWarnings (boolean warnings) {
	checkDevice ();
}

}
